WO2015117490A1 - Method and device for establishing bearer - Google Patents

Abstract

Disclosed are a method and device for establishing a bearer. The method comprises: determining that a bearer is required to be newly established during the switching of a terminal; and sending a switching request message to a target base station to which the terminal is to be switched, wherein the switching request message carries the newly established bearer, and the switching request message is used for enabling the target base station to establish all bearers designated in the switching request message for the terminal. According to the technical solution provided in the present invention, a network side can establish voice bearers simultaneously during the switching of a terminal, thereby improving the call dial-up rate, shortening the call establishment time delay, and improving the user experience.

Description

Method and device for establishing bearer Technical field

The present invention relates to the field of communications, and in particular to a method and an apparatus for establishing a bearer.

Background technique

The 3rd Generation Partnership Project (3GPP) will turn the next-generation mobile wireless network project into System Architecture Evolution (SAE). FIG. 1 is a schematic diagram of a SAE architecture according to the related art. As shown in FIG. 1 , the following network elements may be included in the SAE architecture:

The Evolved RAN (E-RAN) can provide higher uplink and downlink rates, lower transmission delays, and more reliable wireless transmission. The network element included in the E-RAN is an Evolved NodeB (eNodeB), which provides radio resources for access of the terminal.

The Home Subscriber Server (HSS) is set to permanently store user subscription data.

Mobility Management Entity (MME), control plane functional entity, server that temporarily stores user data, responsible for managing and storing user equipment (UE) context (eg, UE/user identity, mobility management state, user security) A parameter, etc., assigns a temporary identifier to the user, when the UE is camped on the tracking area or the network is responsible for authenticating the user; processing all non-access stratum messages between the MME and the UE; triggering paging at the SAE.

Serving Gateway, which is a user plane entity, is responsible for user plane data routing processing, and terminates downlink data of UEs in idle state. Manage and store the SAE bearer context of the UE, for example, Internet Protocol (IP) bearer service parameters and network internal routing information, etc.; is an anchor point of the internal user plane of the 3GPP system, and one user can only have one Serving GW at a time. .

The Packet Data Network Gateway (PDN GW) is responsible for the UE accessing the PDN gateway, assigning the user IP address, and is the mobility anchor of the 3GPP and non-3GPP access systems. Users can access multiple PDN GWs at the same time.

Policy and Charging Rule Functionality (PCRF), which is based on service information and user subscription information and operator configuration information. The Quality of Service (Qos) rules for user data delivery and charging rules. The functional entity can also control the establishment and release of bearers in the access network.

In the next-generation mobile network, IP Multimedia Subsystem (IMS) network can be deployed to provide IP-based voice and video services, thus replacing Circuit Switched (CS) in 2G/3G networks. )area. The voice service of the terminal can be transmitted through the LTE bearer. At present, the mainstream operator has chosen to assign a dedicated access point name (Access Point name, APN for short) to the over-the-air (LTE) voice. The network and the terminal establish a QoS class identifier for the APN. The default bearer of the Identifier (referred to as QCI) is 5, which is used to transmit the signaling required by the user to register in the IMS network, which is called signaling bearer. When the terminal needs to make a call or is called, a dedicated bearer with a QCI of 1 is temporarily established for the terminal to transmit voice data, which is called a voice bearer. When the call ends, the voice bearer is released.

Since the network needs to establish a voice bearer for the terminal when the user is calling or called, the call setup delay will be longer. If the terminal is in the cell edge and the switch is in progress, the VoLTE call occurs, causing the network side to conflict with the voice bearer establishment process. According to the implementation of the current 3GPP standard, the base station will complete the handover priority, and the NAS message in the handover process will be discarded. The core network may directly discard or delay the processing of the voice bearer establishment process, thereby causing the user call not to be dialed or extended. The call establishes a delay, which affects the end user's experience.

Summary of the invention

The embodiment of the present invention provides a method and an apparatus for establishing a bearer, so as to solve at least the problem of how to establish a voice bearer in a case where a cell handover and a voice bearer establishment procedure conflict in the related art.

According to an aspect of the present invention, a method of establishing a bearer is provided.

The method for establishing a bearer according to the embodiment of the present invention includes: determining that the terminal needs to create a new bearer in the handover process; and sending a handover request message to the target base station to which the terminal is to be handed over, where the handover request message carries a new bearer, and the handover request message is used. The target base station is configured to establish all bearers specified in the handover request message for the terminal.

Preferably, the handover request message further carries the identification information of the newly created bearer, wherein the identifier information is used to distinguish between the newly created bearer and the reconstructed bearer that occur during the handover process of the terminal.

Preferably, determining that the terminal needs to create a new bearer in the handover process comprises: after receiving the handover request initiated by the source base station corresponding to the terminal respectively, and receiving the setup bearer request from the serving gateway corresponding to the terminal, Determining whether the terminal is currently performing a handover operation and has not sent a handover request message to the target base station; if yes, establishing a bearer resource for the terminal.

According to another aspect of the present invention, another method of establishing a bearer is provided.

The method for establishing a bearer according to the embodiment of the present invention includes: receiving a handover request message from a mobility management entity, where the handover request message carries a bearer to be newly created by the terminal in the handover process; and the terminal specifies a handover request message All bear.

Preferably, the handover request message further carries the identification information of the newly created bearer, where the identifier information is used to distinguish the bearer to be newly created and the re-established bearer that occur during the handover process of the terminal.

According to still another aspect of the present invention, an apparatus for establishing a bearer is provided.

The device for establishing a bearer according to the embodiment of the present invention includes: a determining module, configured to determine that the terminal needs to create a new bearer during the handover process; and a sending module, configured to send a handover request message to the target base station to which the terminal is to be handed over, where the handover request message is The new bearer is carried in, and the handover request message is used to enable the target base station to establish all the bearers specified in the handover request message for the terminal.

Preferably, the handover request message further carries the identification information of the newly created bearer, wherein the identifier information is used to distinguish between the newly created bearer and the reconstructed bearer that occur during the handover process of the terminal.

Preferably, the determining module includes: a determining unit, configured to determine whether the terminal is currently performing the handover after receiving the handover request initiated by the source base station corresponding to the terminal and receiving the setup bearer request from the serving gateway corresponding to the terminal respectively The operation does not send a handover request message to the target base station; the establishing unit is configured to establish a bearer resource for the terminal when the output of the determining unit is YES.

According to yet another aspect of the present invention, an apparatus for establishing another bearer is provided.

The device for establishing a bearer according to the embodiment of the present invention includes: a receiving module, configured to receive a handover request message from a mobility management entity, where the handover request message carries a bearer to be newly created by the terminal during the handover process; To establish all bearers specified in the handover request message for the terminal.

Preferably, the handover request message further carries the identification information of the newly created bearer, where the identifier information is used to distinguish the bearer to be newly created and the re-established bearer that occur during the handover process of the terminal.

The embodiment of the present invention determines that the terminal needs to create a new bearer in the handover process, and sends a handover request message to the target base station to be switched to the terminal, where the handover request message carries a new bearer, and the handover request message is used to make the target base station The terminal establishes all the bearers specified in the handover request message, and solves the related technologies in the related art. How to establish a voice bearer in the case where the cell handover and the voice bearer establishment process conflict, so that the network side can simultaneously establish a voice bearer in the terminal handover process, thereby improving call dialing rate, shortening call setup delay, and improving User experience.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic diagram of a SAE architecture according to related art;

2 is a flowchart of a method for establishing a bearer according to an embodiment of the present invention;

3 is a flowchart of another method for establishing a bearer according to an embodiment of the present invention;

4 is a flowchart of a process in which an MME changed S1 handover conflicts with a VoLTE called according to a preferred embodiment of the present invention;

5 is a flowchart of a process in which an MME unchanged S1 handover conflicts with a VoLTE called according to a preferred embodiment of the present invention;

6 is a flowchart of a process in which an MME changed S1 handover conflicts with a VoLTE caller according to a preferred embodiment of the present invention;

7 is a flowchart of a process in which an MME unchanged S1 handover conflicts with a VoLTE caller according to a preferred embodiment of the present invention;

FIG. 8 is a structural block diagram of a bearer establishing apparatus according to an embodiment of the present invention; FIG.

9 is a structural block diagram of a bearer establishing apparatus according to a preferred embodiment of the present invention;

FIG. 10 is a structural block diagram of another bearer establishing apparatus according to an embodiment of the present invention.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

2 is a flow chart of a method of establishing a bearer according to an embodiment of the present invention. As shown in FIG. 2, the method may include the following processing steps:

Step S202: determining that the terminal needs to create a new bearer during the handover process;

Step S204: Send a handover request message to the target base station to which the terminal is to be handed over, where the handover request message carries a new bearer, and the handover request message is used to enable the target base station to establish all bearers specified in the handover request message for the terminal.

In the related art, how to establish a voice bearer in a case where a cell handover and a voice bearer establishment procedure conflict. As shown in FIG. 2, when the MME determines that a new bearer needs to be established in the handover process, the MME includes the bearer in the handover request, and then the target eNodeB establishes all bearers specified by the MME for the user, thereby solving the related technology. How to establish a voice bearer in the case where a cell handover and a voice bearer setup process conflict, so that the network side can simultaneously establish a voice bearer in the terminal handover process, thereby improving call dialing rate and shortening call setup delay Improve user experience.

In the preferred implementation process, the foregoing handover request message may further include the identifier information of the newly created bearer, where the identifier information is used to distinguish between the newly created bearer and the reconstructed bearer that occur during the handover process of the terminal.

Preferably, in step S202, determining that the terminal needs to create a new bearer during the handover process may include the following operations:

Step S1: After receiving the handover request initiated by the source base station corresponding to the terminal and receiving the setup bearer request from the serving gateway corresponding to the terminal, determine whether the terminal is currently performing the handover operation and has not sent the handover to the target base station. Request message

Step S2: If yes, establish a bearer resource for the terminal.

In a preferred embodiment, the source side base station initiates a handover request to the source side mobility management entity, and then the source side mobility management entity receives the setup bearer request from the source side serving gateway. If the source-side mobility management entity determines that the current terminal is performing handover and has not sent a handover request to the target-side base station, the terminal establishes a bearer resource for the terminal, and returns a bearer response to the source-side serving gateway.

FIG. 3 is a flowchart of another method for establishing a bearer according to an embodiment of the present invention. As shown in FIG. 3, the method may include the following processing steps:

Step S302: Receive a handover request message from the mobility management entity, where the handover request message carries a bearer to be newly created by the terminal during the handover process;

Step S304: Establish all bearers specified in the handover request message for the terminal.

In the preferred implementation process, the foregoing handover request message may further carry the identifier information of the newly created bearer, where the identifier information is used to distinguish the bearer to be newly created and the reestablished bearer that occur during the handover process of the terminal.

The above preferred implementation process will be further described below in conjunction with the preferred embodiments illustrated in Figures 4-7.

4 is a flow chart of a process in which an MME changed S1 handover conflicts with a VoLTE called according to a preferred embodiment of the present invention. As shown in FIG. 4, the service gateway relocation may occur due to the MME changing S1 handover process. Therefore, in the preferred embodiment, the source side service gateway and the target side service gateway may be the same service gateway, or may be different. Service gateway. The process can include the following processing steps:

Step S402: The source side base station initiates a handover requirement to the source side mobility management entity.

Step S404: The source side mobility management entity receives the setup bearer request from the source side serving gateway.

Step S406: The source-side mobility management entity determines that the current terminal is performing handover, and has not sent a handover request to the target-side base station, and then establishes a bearer resource for the terminal, and returns a bearer response to the source-side service gateway.

Step S408: The source-side mobility management entity sends a forward relocation request message to the target-side mobility management entity, where the forward-redirect relocation request message carries the newly established bearer in the handover process;

Optionally, the forward relocation request message also carries a new bearer identifier, which is used to distinguish the newly established bearer and the reconstructed bearer in the handover.

Step S410: switching other processes of the process, where the existing process can be used here, and thus will not be described again;

Step S412: The target-side mobility management entity sends a handover request message to the target-side base station, where the handover request message carries the newly established bearer in the handover process;

Optionally, the handover request message may also carry a new bearer identifier, which is used to distinguish the newly established bearer and the reconstructed bearer in the handover.

Step S414: The target side base station establishes all bearers specified in the handover request message for the terminal;

Step S416: Other processing of the switching process, where the existing process can be used here, and thus will not be described again.

FIG. 5 is a flowchart of a process in which an MME unchanged S1 handover conflicts with a VoLTE called according to a preferred embodiment of the present invention. As shown in FIG. 5, the serving gateway relocation may occur due to the MME's unchanged S1 handover process. Therefore, in the preferred embodiment, the source side service gateway and the target side service gateway may be the same service gateway, or may be different. Service gateway. The process can include the following processing steps:

Step S502: The source side base station initiates a handover requirement to the mobility management entity.

Step S504: The mobility management entity receives the setup bearer request from the source side serving gateway.

Step S506: The mobility management entity determines that the current terminal is performing handover, and has not sent a handover request to the target side base station, and then establishes a bearer resource for the terminal, and returns a bearer response to the source side serving gateway.

Step S508: The mobility management entity sends a handover request message to the target side base station, where the handover request message carries the newly established bearer in the handover process;

Optionally, the handover request message also carries a new bearer identifier, which is used to distinguish the newly established bearer and the reconstructed bearer in the handover.

Step S510: The target side base station establishes all bearers specified in the handover request message for the terminal.

Step S512: Other processing of the switching process, where the existing process can be used here, and thus will not be described again.

6 is a flow chart of a process in which an MME changed S1 handover conflicts with a VoLTE caller according to a preferred embodiment of the present invention. As shown in FIG. 6 , the service gateway relocation may occur due to the MME changing S1 handover process. Therefore, in the preferred embodiment, the source side service gateway and the target side service gateway may be the same service gateway, or may be different. Service gateway. The process can include the following processing steps:

Step S602: The terminal initiates a resource allocation request to the source mobile management entity.

Step S604: The source side mobility management entity initiates a bearer resource command to the source side serving gateway.

Step S606: The source side base station initiates a handover requirement to the source side mobility management entity.

Step S608: The source side mobility management entity receives the setup bearer request from the source side serving gateway.

Step S610: The source-side mobility management entity determines that the current terminal is performing handover, and has not sent a handover request to the target-side base station, and then establishes a bearer resource for the terminal, and returns a bearer response to the source-side service gateway.

Step S612: The source-side mobility management entity sends a forward relocation request message to the target-side mobility management entity, where the forward-redirect relocation request message carries the newly established bearer in the handover process;

Optionally, the forward relocation request message also carries a new bearer identifier, which is used to distinguish the newly established bearer and the reconstructed bearer in the handover.

Step S614: other processing of the switching process, where the existing process can be used here, and thus will not be described again;

Step S616: The target-side mobility management entity sends a handover request message to the target-side base station, where the handover request message carries the newly established bearer in the handover process;

Optionally, the handover request message also carries a new bearer identifier, which is used to distinguish the newly established bearer and the reconstructed bearer in the handover;

Step S618: The target side base station establishes all bearers specified in the handover request message for the terminal.

Step S620: Other processing of the switching process, where the existing process can be used here, and thus will not be described again.

FIG. 7 is a flowchart of a process in which an MME unchanged S1 handover conflicts with a VoLTE caller according to a preferred embodiment of the present invention. As shown in FIG. 7 , the serving gateway relocation may occur due to the MME unchanged S1 handover process. Therefore, in the preferred embodiment, the source side service gateway and the target side service gateway may be the same service gateway, or may be different. Service gateway. The process can include the following processing steps:

Step S702: The terminal initiates a resource allocation request to the mobility management entity.

Step S704: The mobility management entity initiates a bearer resource command to the source side serving gateway.

Step S706: The source side base station initiates a handover requirement to the mobility management entity.

Step S708: The mobility management entity receives the setup bearer request from the source side serving gateway.

Step S710: The mobility management entity determines that the current terminal is performing handover, and has not sent a handover request to the target side base station, and then establishes a bearer resource for the terminal, and returns a bearer response to the source side serving gateway.

Step S712: The mobility management entity sends a handover request message to the target side base station, where the handover request message carries the newly established bearer in the handover process;

Optionally, the handover request message also carries a new bearer identifier, which is used to distinguish the newly established bearer and the reconstructed bearer in the handover;

Step S714: The target side base station establishes all bearers specified in the handover request message for the terminal.

Step S716: Other processing of the switching process, where the existing process can be used here, and thus will not be described again.

FIG. 8 is a structural block diagram of a bearer establishing apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus for establishing a bearer may include: a determining module 10, configured to determine that a terminal needs to create a new bearer during a handover process; and a sending module 20 configured to send a handover request message to a target base station to which the terminal is to be handed over, where , switching request message The new bearer is carried in, and the handover request message is used to enable the target base station to establish all the bearers specified in the handover request message for the terminal.

The device shown in FIG. 8 solves the problem of how to establish a voice bearer in the case where the cell handover and the voice bearer setup process conflict in the related art, so that the network side can simultaneously establish the voice bearer in the terminal handover process. Therefore, the call dialing rate is improved, the call setup delay is shortened, and the user experience is improved.

In the preferred implementation process, the foregoing handover request message may further include the identifier information of the newly created bearer, where the identifier information is used to distinguish the newly created bearer and the reconstructed bearer that occur during the handover process of the terminal.

Preferably, as shown in FIG. 9, the determining module 10 may include: a determining unit 100 configured to respectively receive a handover request initiated by a source base station corresponding to the terminal and receive a setup bearer request from a serving gateway corresponding to the terminal After that, it is judged whether the terminal is currently performing the handover operation and has not sent the handover request message to the target base station; the establishing unit 102 is configured to establish the bearer resource for the terminal when the output of the determination unit is YES.

FIG. 10 is a structural block diagram of another bearer establishing apparatus according to an embodiment of the present invention. As shown in FIG. 10, the apparatus for establishing a bearer may include: a receiving module 30, configured to receive a handover request message from a mobility management entity, where the handover request message carries a bearer to be newly created by the terminal during the handover process; Module 40 is configured to establish all bearers specified in the handover request message for the terminal.

In the preferred implementation process, the foregoing handover request message may further include the identifier information of the newly created bearer, where the identifier information is used to distinguish the bearer to be newly created and the bearer to be reconstructed that occur during the handover process of the terminal.

From the above description, it can be seen that the above embodiments achieve the following technical effects (it is required that the effects are achievable by some preferred embodiments): the technical solution provided by the embodiment of the present invention is applicable to A scenario in which the MME network element S1 handover process conflicts with the SGW's proprietary bearer setup process. Compared with the prior art, the call setup success rate can be improved, and the call setup delay of the VoLTE calling party or the called party during the handover process can be reduced, and the user experience is improved.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

As described above, the method and apparatus for establishing a bearer provided by the embodiment of the present invention have the following beneficial effects: the network side can simultaneously establish a voice bearer in the terminal handover process, thereby improving call dialing rate and shortening call setup. Delay, improve user experience.

Claims (10)

A method for establishing a bearer includes: Determining that the terminal needs to create a new bearer during the handover process; Sending a handover request message to the target base station to which the terminal is to be handed over, where the handover request message carries the new bearer, and the handover request message is used to enable the target base station to establish the handover for the terminal Request all bearers specified in the message. The method according to claim 1, wherein the handover request message further carries identification information of the newly created bearer, wherein the identifier information is used to distinguish the new bearer that occurs during the handover process of the terminal. Hosted with reconstruction. The method of claim 1, wherein determining that the terminal needs to create a new bearer during the handover process comprises: After receiving the handover request initiated by the source base station corresponding to the terminal and receiving the setup bearer request from the serving gateway corresponding to the terminal, determining whether the terminal is currently performing the handover operation and not yet Transmitting, by the target base station, the handover request message; If yes, the bearer resource is established for the terminal. A method for establishing a bearer includes: Receiving a handover request message from the mobility management entity, where the handover request message carries a bearer to be newly created by the terminal during the handover process; All bearers specified in the handover request message are established for the terminal. The method according to claim 4, wherein the handover request message further carries identification information of the newly created bearer, wherein the identifier information is used to distinguish the to-be-created new one that occurs during the handover process of the terminal. Bearer and rebuild bearer. A device for establishing a bearer includes: Determining a module, setting to determine that the terminal needs to create a new bearer during the handover process; a sending module, configured to send a handover request message to the target base station to which the terminal is to be handed over, where the handover request message carries the newly created bearer, and the handover request message is used to enable the target base station to be the The terminal establishes all bearers specified in the handover request message. The device according to claim 6, wherein the handover request message further carries the identification information of the newly created bearer, wherein the identifier information is used to distinguish the new bearer that occurs during the handover process of the terminal. Hosted with reconstruction. The apparatus of claim 6 wherein said determining module comprises: The determining unit is configured to determine whether the terminal is currently performing a handover operation after receiving a handover request initiated by the source base station corresponding to the terminal and receiving a setup bearer request from a serving gateway corresponding to the terminal And the handover request message has not been sent to the target base station; And establishing a unit, configured to establish a bearer resource for the terminal when the output of the determining unit is YES. A device for establishing a bearer includes: The receiving module is configured to receive a handover request message from the mobility management entity, where the handover request message carries a bearer to be newly created by the terminal during the handover process; And establishing a module, configured to establish, for the terminal, all bearers specified in the handover request message. The device according to claim 9, wherein the handover request message further carries identification information of the newly created bearer, wherein the identifier information is used to distinguish the to-be-created new one that occurs during the handover process of the terminal Bearer and rebuild bearer.

Images